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Chemistry Question on General Principles and Processes of Isolation of Elements

Upon heating with Cu2S.Cu_2S. the reagent(s) that give copper metal is/are

A

CuFeS2CuFeS_2

B

CuOCuO

C

Cu2OCu_2O

D

CuSO4CuSO_4

Answer

CuSO4CuSO_4

Explanation

Solution

(A) 2CuFeS2+O2−>[Δ]Cu2S+2FeS+SO22 CuFeS _{2}+ O _{2} {->[{\Delta}]}Cu _{2} S +2 FeS + SO _{2}
(B) 4CuO−>[1100∘C]2Cu2O+O24 CuO {->[{1100^{\circ} C }]} 2 Cu _{2} O + O _{2}
2Cu2O+Cu2S−>[Δ]6Cu+SO22 Cu _{2} O + Cu _{2} S {->[{\Delta}]} 6 Cu + SO _{2}
(C) Cu2S+2Cu2O−>[Δ]6Cu+SO2Cu _{2} S +2 Cu _{2} O {->[{\Delta}]} 6 Cu + SO _{2}
(D) CuSO4−>[720∘C]CuO+SO2+12O2CuSO _{4} {->[{720^{\circ} C }]} CuO + SO _{2}+\frac{1}{2} O _{2}
4CuO−>[1100∘C]2Cu2O+O24 CuO {->[{1100^{\circ} C }]} 2 Cu _{2} O + O _{2}
2Cu2O+Cu2S−>[△]6Cu+SO22 Cu _{2} O + Cu _{2} S {->[{\triangle}]} 6 Cu + SO _{2}